| 摘要 |
PROBLEM TO BE SOLVED: To inspect the groove face part of the conical surface in a ridgeline from the outer surface of a square column to perform precise inspection over the whole periphery of a welding groove face. SOLUTION: The welding groove face positioned within the ridgeline of an inspection target comprising the square column is inspected by a two-probe method using two probes holding the ridgeline and the central part of the welding groove face positioned between ridgelines is inspected by one probe method. Both of them are used to perform the flaw detection of the whole periphery of the conical welding groove face in the inspection target. At a place where the two-probe method is performed, within a plane containing the normal line with respect to the flaw surface including the flaw present on the conical welding groove face in the inspection target, the ultrasonic beam transmitting and receiving direction of the respective probes and a probe scanning position are set at a position of regular reflection with respect to the normal line. COPYRIGHT: (C)2007,JPO&INPIT
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